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D.L.HUGHEs./f' y PAPBBFOR BOILER GOVBBINGS.

No. 299.983. Patented June 10, 1884.

nmWJu-mn UNITED STATES DAXIEL L. HUGHES, OF MILVAUKEE, WISCONSIN.

PAPER FOR BOILER-COVERING.

SPECIFICATION forming part of Letters Application tiled August .To a/ZZ 1071.071 it may 6072.067172.:

Be it known that I, DANIEL L. HI'GHEs, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State Patent No. 299,983, dated .rune 1o, 1884.

E14, 1833. (No specimens-l and allowed to drv when it is coated with :I past'TU-rmeil as ollows: black oxide ol magtwo parts; .wo pars: s1 1- nesi. zinc-willie "lca e soda about four parifs, or sufficient In 35 5 of Wisconsin, have invented certain new and quantify 't'o reduce the magnesia and zincnseful Improvements in Paper for Boiler-Covering; and I do hereby declare the following to be a' full, clear, and exact description of the invention, such as will enable others skilled Io in the art to which it appertains to make and use the same, reference being had to the ac` companying drawing, and to letters origures of reference marked thereon, which form a part of this specification.

I 5 The accompanying drawing represents a cr0ss-section of a steam-pipe surrounded with boiler-covering, the paper and cloth of which are prepared by my improved method.

Like parts in said drawing are represented 2o by the same reference-letters.

A represents a steam-pipe; B, asheetmetal support for the covering. C O represent paper, and D cloth, prepared by my improved method. E represent-s a layer of felt or other 25 packing.

My invention relates particularly to the improvements in methods of treating paper and cloth whereby the same is made non-combustible, and is adapted to be used as a covering 3o for steam pipes and boilers.

The cloth or paper is first thoroughly saturated pu Ii si Ica e white to a thin paste-like consistency. To one gallon of the resulting compound add one part of linseedoil. The compound thus formed having Been spread upon the paper or cloth, 4o the same is allowed to become thoroughly drv. when it is arfain covered with a thin coatilnT of silicate soda when IE is ready for use. mescribed my inv ention, what I claim as new, and desire to secure by Letters 4 5 Patent, is

The method of making paper and cloth noncombustible for steam-pipes, consisting, first, in saturating the same with silicate; second, coating the same when dry* witha compound 5o formed of black oxide of giagnesia, two parts; zinc-white, two parts; silicate soda, four parts; linseed-oil, one part; and, third, coating the covering when dry with silicate soda, all substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL L. HUGHES.

llitnesses:

Jas. B. ERwIN, E. G. AsMUs. 

